Table 1. CTEPH prediction score (26).

	Score
Unprovoked PE	+6 points
Known hypothyroidism	+3 points
Symptom onset <2 weeks before PE diagnosis	+3 points
Right ventricular dysfunction on CT or TTE	+2 points
Known diabetes mellitus	−3 points
Thrombolytic therapy or embolectomy for the acute PE event	−3 points

Low risk: ≤6 points. High risk: >6 points. CTEPH, chronic thromboembolic pulmonary hypertension; PE, pulmonary embolism; CT, computed tomography, TTE, transthoracic echocardiography.